Question $1(4$ points$)$

What is the result of the expression below expressed in binary?

$1011*{101}_2+{101\mathrm{.}11}_2+{1100\mathrm{.}011}_2$

Question $2(4$ points$)$

What is the result of the expression below expressed in hexadecimal?

$678*6_{16}+54*C_{16}+$EDA$*D_{16}$

Question $3(4$ points$)$

What is the result of the expression below expressed in binary?

${10101\mathrm{.}01010}_2-{1111\mathrm{.}11}_2$